U.S. federal trademark · Serial No. 73272779 · Reg. No. 287
Sheets and Plates of Filtering Material Used in Residences or Industry to Filter Gases or Fluids, Said Filtering Material Consisting of Spongy Material, Fleeces and/or Fabrics, the Fleeces or Fabrics Being Made from Natural or Artificial Fibers, Eventually as a Multi-Layer Compound and/or Containing Active Carbons
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